PSYB32H3 Chapter Notes - Chapter 2: Intellectual Disability, Severe Combined Immunodeficiency, Cleft Lip And Cleft Palate
Document Summary
Heredity and the environment: concepts of genotype and phenotype a framework for exploring the interactions of genes and environment. Genotype is the particular set of genes that a person inherits from his or her parents; exception of twin, no two people have exactly the same genotype. Phenotype is the observable and measurable expression of an individual"s physical and behavioral characteristics. In the moist environment of a woman"s oviduct, the sperm and the egg unite to create a new living organism that has the potential to develop into a human being. New organism is referred to as the zygote. The egg, or the ovum, is the largest human cell, is about 90,000 times as heavy as the sperm that penetrates it. The threadlike chromosomes carry genetic information that helps direct development. Half of each pair from the father and half from the mother.
